Fleshjacks and Fleshlights are available that have the opening molded from some porn star's ass or vagina. And they are popular. The inside texture is different for each model. And it turns out to be good for me; the ones molded from a person have a reasonable amount of tightness/looseness whereas the generic ass hole one is much much too tight for me. (And it's not like I'm mega-thick; makes me wonder if most of their customers have pencil dicks.)